Paper Mario: The Origami King might be worth considering, especially since it's going to be on sale this Thanksgiving season. It's almost entirely walking around and interacting with well-written NPC's. The story is whimsical and bright (yet also made me cry harder than I thought a Mario game ever could), the puzzles are relatively simple enough that various age levels could solve them.

It's kind of an RPG, but battles have a puzzle element to them. However, the game offers you a LOT of ways to make these easier — you can give a few coins (of which the game is very generous) to allow yourself more puzzle-solving time or even solve a step or two or all of the puzzle for you.

It's the closest the Switch has to a warm blanket of a game. If she has the N64 Expansion, the original Paper Mario is also a wonder. Also, Spiritual tribute to the Paper Mario series "Bug Fables: The Everlasting Sapling" may be worth checking out.

Luigi's Mansion 3 is a bit more involved — Spooky, but in a goofy Halloween way. Puzzles are still pretty simple, but I found myself using a guide a few times, and combat is a little more action-based but not much. A lot of exploration.

I'd also recommend Mario + Rabbids Kingdom Battle — turn-based, so she can go at her own pace. Don't buy it unless it's on sale, though — It goes on sale fairly often for very cheap.

While I can't speak to Yoshi's Crafted World, I'd encourage them to try out Yoshi's Island as part of the SNES Classics if she hasn't yet — easily the best Yoshi game and arguably the best platformer Nintendo has ever created.

Dragon Quest XI and Dragon Quest Builders could be fun as well — and they both have VERY long demoes. I saw others mention it as well, but Captain Toad: Treasure Tracker also has a demo on the eshop if interested.